With Sonic Generations speeding to the HD consoles and a certain 3D handheld in the next month or so, talk has arisen regarding the Blue Hedgehog's next outing. And if tssz news's sources are worthy, Wii U could be seeing a juicy exclusive.
According to the site, the next Sonic game will be entitled Sonic Dimensions, taking place after Generations, and deemed the spiritual sequel to Colours. The plotline will follow Dr Eggman's usual crazy schemes, this time messing around with the Space-time continuum, which not only affects Sonic's planet, but the blue blur himself. Because of this, Sonic will split into 5 different personalities of himself, each with a different colour and ability (seemingly taking the place of the wisp abilities in Colours).
Red Sonic can open up areas by making use of explosions, but can't leap as high and is slower. Yellow Sonic (not Super Sonic) is the fastest, but takes damage easily. Purple Sonic will channel Silver's spirit and be able to float and move platforms. The Orange personality is the slower one until powered up. White Sonic will act like a Super Guide and only appear after a certain number of deaths in a stage, though using him guarantees a lower rank at the end.
What will undoubtedly grab the attention of Sonic Sceptics is the rumour of Nintendo themselves assisting Sega with design in the game, as well as Sega reuniting nearly the entire Sonic Colours development team for Dimensions. This direct involvement suggests the game would be an exclusive to Nintendo's next generation device, as would talk of the game making heavy use of up to 4 Wii U Pads (meaning Nintendo has gotten more than 2 working with the machine).
Adding to the site's credibility is their accurate reporting on Sonic Generations 6 months before it was unveiled, so there could easily be a lot of truth to this.